The speed of light is approximately 186,000 miles per second – a speed impossible to wrap our minds around. But the universe is massive on a scale that makes even such incomprehensible speed seem somehow not fast enough. For example, the sun is around 93 million miles away from earth. This means it takes a bit over 8 minutes for light from the sun to reach our planet. In other words, we are seeing old light. By the time we see the first light of the sun each morning, the sun itself is actually 8 minutes ahead, and when the last light of day reaches earth, the sun has in…
